Illinois Society of Architects · Chicago · leaf 15
ry fine Para rubber, withoutany reclaimed or soft rubber. It is homogenous in character, placed concentric-ally about the conductor and has a tensile strength of not less than 1000 poundsper square inch. A distinguishing mark on Genuine Okonite consists of a singleridge running the entire length of… … 14
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
